package com.yowosoft.util;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;

import com.yowosoft.model.LinkMessageType;

public class CheckUtils {
	private static final String token="hatcher";
	public static boolean checkSignature(LinkMessageType messageType){
		String[] arr=new String[]{token,messageType.getTimestamp(),messageType.getNonce()};
		//排序
		Arrays.sort(arr);
		//生成字符串
		StringBuffer content=new StringBuffer();
		for(int i=0;i<arr.length;i++){
			content.append(arr[i]);
		}
		//sha1加密
		String temp=SHA1(content.toString());
		return temp.equals(messageType.getSignature());
		
	}
	public static String SHA1(String decript) {
        try {
            MessageDigest digest = java.security.MessageDigest
                    .getInstance("SHA-1");
            try {
				digest.update(decript.getBytes("UTF-8"));
			} catch (UnsupportedEncodingException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
            byte messageDigest[] = digest.digest();
            // Create Hex String
            StringBuffer hexString = new StringBuffer();
            // 字节数组转换为 十六进制 数
            for (int i = 0; i < messageDigest.length; i++) {
                String shaHex = Integer.toHexString(messageDigest[i] & 0xFF);
                if (shaHex.length() < 2) {
                    hexString.append(0);
                }
                hexString.append(shaHex);
            }
            return hexString.toString();
 
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        return "";
    }
}
